A Human Factors Professional works to design "stuff," with ergonomics being a key factor. As taken from the Board of Certification in Professional Ergonomics, they state that, "HFE professionals contribute to the design of all kinds of systems, such as work systems and product/service systems. Using knowledge of people's cognitive and physical capabilities, needs and limitations, HFE professionals take a systems approach to design for people. The goal is optimal human well-being and performance with overall system effectiveness